books.google.com - The concentration of wealth today in such a small number of hands inevitably created a dynamic that led to freewheeling financial speculation—a dynamic that produced similarly disastrous results in the last great age of inequality, in the 1920s. Such concentrated economic power reverberates throughout...https://books.google.com/books/about/Billionaires_Ball.html?id=I4_HY0QmTp0C&q=progressive&utm_source=gb-gplus-shareBillionaires' Ball